/* small useful functions collected over the net */
"use strict";
MT.namespace("core");
MT(
	MT.core.Helper = function(){

	},
	{
		isImage: function(path){
			var ext = this.getExt(path);
			return (ext == "png" || ext == "jpg" || ext == "gif" || ext == "jpeg");
		},
		
		// default upload - managed by source editor
		isSource: function(path){
			return !this.isImage(path);
		},
   
		isFont: function(path){
			var ext = this.getExt(path);
			return (ext == "ttf" || ext == "otf" || ext == "eot" || ext == "woff" || ext == "woff2");
		},
   
		htmlEntities: function(str) {
			return String(str).replace(/&/g, '&amp;').replace(/</g, '&lt;').replace(/>/g, '&gt;').replace(/"/g, '&quot;');
		},
   
		isAudio: function(path){
			var ext = this.getExt(path);
			return (ext == "mp3" || ext == "wav" || ext == "ogg" || ext == "aac");
		},
   
		getExt: function(path){
			return path.split(".").pop().toLowerCase();
		},

		strToBuff: function(str) {
			var buf = new ArrayBuffer(str.length * 2);
			var bufView = new Uint16Array(buf);
			for (var i = 0; i < str.length; i++) {
				bufView[i] = str.charCodeAt(i);
			}
			return buf;
		},
		select: function(el) {
			var range = document.createRange();
			range.selectNodeContents(el);
			var sel = window.getSelection();
			sel.removeAllRanges();
			sel.addRange(range);
		},
		clearSelection: function(){
			window.getSelection().removeAllRanges();
		},
		uuid: function(){
			var d = new Date().getTime();
			var uuid = 'xxxxxxxx-xxxx-4xxx-yxxx-xxxxxxxxxxxx'.replace(/[xy]/g, function(c) {
				var r = (d + Math.random()*16)%16 | 0;
				d = Math.floor(d/16);
				return (c=='x' ? r : (r&0x3|0x8)).toString(16);
			});
			return uuid;
		},
		setCookie: function(cname, cvalue, exdays){
			var expires = "";
			if(exdays){
				var d = new Date();
				d.setTime(d.getTime() + (exdays * 24 * 60 * 60 * 1000));
				var expires = "expires="+d.toUTCString();
			}
			
			document.cookie = cname + "=" + cvalue + "; " + expires;
		},
		getCookie: function(cname){
			var name = cname + "=";
			var ca = document.cookie.split(';');
			for(var i=0; i<ca.length; i++) {
				var c = ca[i];
				while (c.charAt(0)==' ') c = c.substring(1);
				if (c.indexOf(name) == 0) return c.substring(name.length, c.length);
			}
			return "";
		},
   
		updateObject: function(obj, data){
			for(var i in data){
				if(typeof data[i] == "object"){
					if(obj[i] == void(0)){
						obj[i] = data[i];
					}
					else{
						this.updateObject(obj[i], data[i]);
					}
				}
				else{
					obj[i] = data[i];
				}
			}
		},
   
		loadSwf: function(url, parent){
			parent = parent || document.body;
			var objElement = document.createElement('object');
			objElement.setAttribute('type', 'application/x-shockwave-flash');
			objElement.setAttribute('data', url);
			parent.appendChild(objElement);
			
			return objElement;
		},
		
		dowload: function(title, content){
			var a = document.createElement("a");
			var b = new Blob([content]);
			a.style.cssText = "position: fixed; top - 1000";
			a.download = title;
			a.href = window.URL.createObjectURL(b);
			
			document.body.appendChild(a);
			
			a.click();
			
			document.body.removeChild(a);
		},
   
	}
);
(function(){
/* A JavaScript implementation of the Secure Hash Algorithm, SHA-256
 * Version 0.3 Copyright Angel Marin 2003-2004 - http://anmar.eu.org/
 * Distributed under the BSD License
 * Some bits taken from Paul Johnston's SHA-1 implementation
 */
var chrsz = 16; /* bits per input character. 8 - ASCII; 16 - Unicode */
function safe_add (x, y) {
	var lsw = (x & 0xFFFF) + (y & 0xFFFF);
	var msw = (x >> 16) + (y >> 16) + (lsw >> 16);
	return (msw << 16) | (lsw & 0xFFFF);
}
function S (X, n) {return ( X >>> n ) | (X << (32 - n));}
function R (X, n) {return ( X >>> n );}
function Ch(x, y, z) {return ((x & y) ^ ((~x) & z));}
function Maj(x, y, z) {return ((x & y) ^ (x & z) ^ (y & z));}
function Sigma0256(x) {return (S(x, 2) ^ S(x, 13) ^ S(x, 22));}
function Sigma1256(x) {return (S(x, 6) ^ S(x, 11) ^ S(x, 25));}
function Gamma0256(x) {return (S(x, 7) ^ S(x, 18) ^ R(x, 3));}
function Gamma1256(x) {return (S(x, 17) ^ S(x, 19) ^ R(x, 10));}
function core_sha256 (m, l) {
		var K = new Array(0x428A2F98,0x71374491,0xB5C0FBCF,0xE9B5DBA5,0x3956C25B,0x59F111F1,0x923F82A4,0xAB1C5ED5,0xD807AA98,0x12835B01,0x243185BE,0x550C7DC3,0x72BE5D74,0x80DEB1FE,0x9BDC06A7,0xC19BF174,0xE49B69C1,0xEFBE4786,0xFC19DC6,0x240CA1CC,0x2DE92C6F,0x4A7484AA,0x5CB0A9DC,0x76F988DA,0x983E5152,0xA831C66D,0xB00327C8,0xBF597FC7,0xC6E00BF3,0xD5A79147,0x6CA6351,0x14292967,0x27B70A85,0x2E1B2138,0x4D2C6DFC,0x53380D13,0x650A7354,0x766A0ABB,0x81C2C92E,0x92722C85,0xA2BFE8A1,0xA81A664B,0xC24B8B70,0xC76C51A3,0xD192E819,0xD6990624,0xF40E3585,0x106AA070,0x19A4C116,0x1E376C08,0x2748774C,0x34B0BCB5,0x391C0CB3,0x4ED8AA4A,0x5B9CCA4F,0x682E6FF3,0x748F82EE,0x78A5636F,0x84C87814,0x8CC70208,0x90BEFFFA,0xA4506CEB,0xBEF9A3F7,0xC67178F2);
		var HASH = new Array(0x6A09E667, 0xBB67AE85, 0x3C6EF372, 0xA54FF53A, 0x510E527F, 0x9B05688C, 0x1F83D9AB, 0x5BE0CD19);
		var W = new Array(64);
		var a, b, c, d, e, f, g, h, i, j;
		var T1, T2;
		/* append padding */
		m[l >> 5] |= 0x80 << (24 - l % 32);
		m[((l + 64 >> 9) << 4) + 15] = l;
		for ( var i = 0; i<m.length; i+=16 ) {
				a = HASH[0]; b = HASH[1]; c = HASH[2]; d = HASH[3]; e = HASH[4]; f = HASH[5]; g = HASH[6]; h = HASH[7];
				for ( var j = 0; j<64; j++) {
						if (j < 16) W[j] = m[j + i];
						else W[j] = safe_add(safe_add(safe_add(Gamma1256(W[j - 2]), W[j - 7]), Gamma0256(W[j - 15])), W[j - 16]);
						T1 = safe_add(safe_add(safe_add(safe_add(h, Sigma1256(e)), Ch(e, f, g)), K[j]), W[j]);
						T2 = safe_add(Sigma0256(a), Maj(a, b, c));
						h = g; g = f; f = e; e = safe_add(d, T1); d = c; c = b; b = a; a = safe_add(T1, T2);
				}
				HASH[0] = safe_add(a, HASH[0]); HASH[1] = safe_add(b, HASH[1]); HASH[2] = safe_add(c, HASH[2]); HASH[3] = safe_add(d, HASH[3]); HASH[4] = safe_add(e, HASH[4]); HASH[5] = safe_add(f, HASH[5]); HASH[6] = safe_add(g, HASH[6]); HASH[7] = safe_add(h, HASH[7]);
		}
		return HASH;
}
function str2binb (str) {
	var bin = Array();
	var mask = (1 << chrsz) - 1;
	for(var i = 0; i < str.length * chrsz; i += chrsz)
		bin[i>>5] |= (str.charCodeAt(i / chrsz) & mask) << (24 - i%32);
	return bin;
}
function binb2hex (binarray) {
	var hexcase = 0; /* hex output format. 0 - lowercase; 1 - uppercase */
	var hex_tab = hexcase ? "0123456789ABCDEF" : "0123456789abcdef";
	var str = "";
	for (var i = 0; i < binarray.length * 4; i++) {
		str += hex_tab.charAt((binarray[i>>2] >> ((3 - i%4)*8+4)) & 0xF) + hex_tab.charAt((binarray[i>>2] >> ((3 - i%4)*8)) & 0xF);
	}
	return str;
}
function hex_sha256(s){return binb2hex(core_sha256(str2binb(s),s.length * chrsz));}
MT.core.Helper.sha256 = hex_sha256;


MT.helper = MT.core.Helper;
})();